<template>
    <div>
        <!-- 顶部滑动条-->
        <div id="slider" class="mui-slider">
            <div id="sliderSegmentedControl" class="mui-scroll-wrapper mui-slider-indicator mui-segmented-control mui-segmented-control-inverted">
                <div class="mui-scroll">
                    <a :class="['mui-control-item',item.id === 0 ? 'mui-active': '']"
                       v-for="item in cates"
                       :key="item.id"
                    @click="getPhotoListByCateId(item.id)">
                        {{item.title}}
                    </a>
                </div>
            </div>

        </div>

        <!-- 图片列表区域-->
        <ul class="photo-list">
            <router-link v-for="item in list" :key="item.id" :to="'/home/photoinfo' + item.id" tag="li">
                <img v-lazy="item.img_url">
                <div class="info">
                    <h1 class="info-title">{{item.title}}</h1>
                    <div class="info-body">{{item.zhaiyao}}</div>
                </div>
            </router-link>
        </ul>

    </div>
</template>

<script>
    // 1. 导入 mui 的js文件
    import mui from '../../lib/mui/js/mui.min.js';

    export default {
        data(){
            return {
                cates:[], // 所有分类的数组
                list:[] // 图片列表的数组
            }
        },
        created(){
          this.getAllCategory();
          this.getPhotoListByCateId(0);
        },
        mounted(){
        // mounted 里面的 DOM元素是最新的
            // 2. 初始化滑动条
            mui('.mui-scroll-wrapper').scroll({
                deceleration:0.0005
            });
        },
        methods:{
            getAllCategory(){
                this.$http.get("api/getimgcategory").then(result => {
                    if(result.body.status === 0){
                        // 手动拼接出的一个最完整的 分类列表
                        result.body.message.unshift({title:'全部',id:0});
                        this.cates = result.body.message;
                    }
                })
            },

            getPhotoListByCateId(cateId){
                this.$http.get("api/getimages/" + cateId).then(result => {
                    if(result.body.status === 0){
                        this.list = result.body.message;
                    }
                })
            }
        }
    }



</script>

<style lang="scss" scoped>

    *{
        touch-action: pan-y;
    }

    .photo-list
    {
        list-style: none;
        margin: 0;
        padding: 10px;
        padding-bottom: 0;


        li{
            background-color: #ccc;
            text-align: center;
            margin-bottom: 10px;
            box-shadow:0 0 10px #999;
            position: relative;
            img{
                width: 100%;
                vertical-align: middle;
            }

            img[lazy=loading] {
                width: 40px;
                height: 300px;
                margin: auto;
            }

            .info{
                color: white;
                text-align: left;
                position: absolute;
                bottom: 0;
                background-color: rgba(0,0,0,0.4);
                max-height: 84px;
                .info-title{
                    font-size: 14px;
                }
                .info-body{
                    font-size: 12px;
                }
            }

        }
    }

</style>